[michaelt]

I'm sure it depends on the computer.

Back when I had a mid-2010 mac mini, there was a noticeable lag between resizing an Atom window and the contents redrawing - when sublime and gedit were fine with the same files.

That was a comparatively slow computer; someone with a higher performance computer probably wouldn't think the performance was all that poor. I can only assume the Atom developers find the performance tolerable.

Still, it reminded me of the old joke [1] that the speed of software halves every 18 months.

[1] https://en.wikipedia.org/wiki/Wirth%27s_law